If you want to show off like a professional chef, dunk a duck in this marinade, similar to one created by James Beard, the master of American cooking. The Asian-accented marinade and plum finishing sauce will part your lips into a gorgeous smile.
About 3 hours before you plan to barbecue, arrange a bamboo steamer over a saucepan of water and place the duck breasts in the steamer. Steam the breasts over medium-high heat for 20 minutes. Discard the greasy steaming liquid.
While the breasts steam, mix the marinade ingredients in a large glass measuring cup. Place the breasts in a shallow, nonreactive dish